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基于本征正交分解的叶片碰摩系统降阶方法

魏代同 陈星 陈玉刚 李宏坤

魏代同, 陈星, 陈玉刚, 李宏坤. 基于本征正交分解的叶片碰摩系统降阶方法[J]. 航空动力学报, 2022, 37(4): 711-720. doi: 10.13224/j.cnki.jasp.20210180
引用本文: 魏代同, 陈星, 陈玉刚, 李宏坤. 基于本征正交分解的叶片碰摩系统降阶方法[J]. 航空动力学报, 2022, 37(4): 711-720. doi: 10.13224/j.cnki.jasp.20210180
WEI Daitong, CHEN Xing, CHEN Yugang, LI Hongkun. Reduced order method of blade rubbing system based on proper orthogonal decomposition[J]. Journal of Aerospace Power, 2022, 37(4): 711-720. doi: 10.13224/j.cnki.jasp.20210180
Citation: WEI Daitong, CHEN Xing, CHEN Yugang, LI Hongkun. Reduced order method of blade rubbing system based on proper orthogonal decomposition[J]. Journal of Aerospace Power, 2022, 37(4): 711-720. doi: 10.13224/j.cnki.jasp.20210180

基于本征正交分解的叶片碰摩系统降阶方法

doi: 10.13224/j.cnki.jasp.20210180
基金项目: 国家重点基础研究发展计划(2020YFB2010800); 国家自然科学基金(92060105,U1808214)
详细信息
    作者简介:

    魏代同(1992-),男,博士生,主要从事叶轮机械结构动力学、状态监测及故障诊断研究。

    通讯作者:

    陈星(1964-),男,副教授、硕士生导师,硕士,主要从事重大设备状态监测及故障诊断研究。E-mail:chenxing@dlut.edu.cn

  • 中图分类号: V231.96

Reduced order method of blade rubbing system based on proper orthogonal decomposition

  • 摘要: 针对叶片碰摩响应求解问题,提出了采用本征正交分解进行动力学降阶的方法。通过对快照矩阵进行本征正交分解生成投影子空间,将系统动力学方程投影到子空间进行模型降阶,并结合数值积分方法进行了碰摩响应求解。基于降阶模型分析了不同转速及侵入量参数下的叶片碰摩响应,并与全阶模型进行了对比。结果表明:降阶模型的时域响应幅值偏差小于5%,计算效率了提升98.4%;通过改变叶片转速、侵入量参数验证了降阶模型的鲁棒性,并且发现随着转速、侵入量的增加,本征正交模态能量在低阶与高阶之间发生转移,并呈现出不同的传递规律,由转速引起的模态能量转移与结构的固有频率存在一定关系。该方法及结论可为叶片碰摩分析及故障诊断提供依据。

     

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出版历程
  • 收稿日期:  2021-04-20
  • 刊出日期:  2022-04-28

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